Explain about the partitioning, shuffle and sort phase in MapReduce?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
Define Writable data types in Hadoop MapReduce?
Why MapReduce uses the key-value pair to process the data?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
Is it possible to search for files using wildcards?
What does conf.setmapper class do?
Explain what combiners are and when you should use a combiner in a mapreduce job?
What is RecordReader in a Map Reduce?
Why is Apache Spark faster than Hadoop MapReduce?
Compare Pig vs Hive vs Hadoop MapReduce?
What do you understand by the term Straggler ?
What is a Distributed Cache in Hadoop?